Price Info - 2005 Escalade Engine, Trans, ECU, Harness

Advertised as a 6.0L Engine, Transmission, ECU and Wire Harness from a 2005 Cadillac Escalade with 63K miles. Should be the LQ9, right? Would $3000 be a reasonable price for the package. I am planning a swap into a '84 Monte Carlo SS. Any advice appreciated.